AARP (formerly American Association of Retired Persons) is the U.S.'s largest nonprofit, nonpartisan organization for people 50+, dedicated to empowering them to age well through advocacy, information, and service, focusing on health security (Medicare, drug costs), financial stability (Social Security, jobs), and community living, while also offering member benefits like discounts and publications (AARP Magazine, Bulletin). It acts as a powerful lobby for seniors' issues and provides support via its Foundation for low-income older adults, working to enhance quality of life for everyone as they age.